KR102612916B1 - Apparatus for controlling air conditioner of vihicle and method thereof - Google Patents

Abstract

A vehicle air conditioning control device according to an embodiment of the present invention includes an input unit that receives opening/closing information about at least one of a window or door of a vehicle and air quality information outside the vehicle, and an input unit that receives information about the air quality outside the vehicle, A determination unit that determines whether a situation in which mixing is possible occurs, a comparison unit that compares the input air quality information with a preset critical range when it is determined that a situation in which mixing of the indoor air of the vehicle and the outside air is possible occurs, the air quality information and the A selection unit for selecting a first control mode or a second control mode based on at least one of a result of comparing a threshold range and the opening/closing information, and a control value generated through the first control mode or the second control mode. and a control unit that controls at least one of an air outlet opening position, an air circulation mode, and an air discharge intensity of the vehicle air conditioning device included in the vehicle.

Description

Vehicle air conditioning control device and method {APPARATUS FOR CONTROLLING AIR CONDITIONER OF VIHICLE AND METHOD THEREOF}

The embodiment relates to a vehicle air conditioning control device and method.

A vehicle air conditioning system is a device for cooling or heating the vehicle interior by introducing air from outside the vehicle into the vehicle interior or heating or cooling the air in the vehicle interior during circulation. The interior of the air conditioning case includes an evaporator for cooling, Air cooled or heated by the heater core and evaporator for heating or the heater core is selectively blown to each part of the vehicle interior using a door for switching the blowing mode.

Research on these automotive air conditioning devices is being conducted in a direction to maintain comfort inside the vehicle as the vehicle penetration rate continues to increase and the time users spend inside the vehicle increases. However, the interior of a vehicle is narrow and sealed, so it is easy to be polluted, and the pollution inside the vehicle is further aggravated by fine dust and various pollutants in the city, making it difficult to improve.

In particular, when doors or windows are opened for various purposes, including getting on and off, a large amount of various external pollutants flow into the vehicle. In addition, the energy required for air conditioning of the vehicle interior space increases due to the outflow of air inside the vehicle interior or the influx of air from outside the vehicle interior due to the opening of the vehicle's doors or windows. In order to solve this problem, various configurations that filter pollutants in vehicle air conditioning systems are being studied, but there is a problem that they are only a reactive measure and cannot prevent the inflow of pollutants in advance.

The technology behind the present invention is disclosed in Korean Patent Publication No. 10-2014-0086690 (published on July 8, 2014).

An embodiment is a vehicle air conditioning control device and method that prevents contaminants from entering the vehicle when the vehicle's doors or windows are opened and minimizes the increase in air conditioning energy inside the vehicle due to the outflow of air inside the vehicle or the inflow of air from outside the vehicle. It is intended to provide.

The problem to be solved in the embodiment is not limited to this, and it will also include means of solving the problem described below and purposes and effects that can be understood from the embodiment.

A vehicle air conditioning control device according to an embodiment of the present invention includes an input unit that receives opening/closing information about at least one of a window or door of a vehicle and air quality information outside the vehicle, and an input unit that receives information about the air quality outside the vehicle, A determination unit that determines whether a situation in which mixing is possible occurs, a comparison unit that compares the input air quality information with a preset critical range when it is determined that a situation in which mixing of the indoor air of the vehicle and the outside air is possible occurs, the air quality information and the A selection unit for selecting a first control mode or a second control mode based on at least one of a result of comparing a threshold range and the opening/closing information, and a control value generated through the first control mode or the second control mode. and a control unit that controls at least one of an air outlet opening position, an air circulation mode, and an air discharge intensity of the vehicle air conditioning device included in the vehicle.

The air quality information includes fine dust (PM10) concentration outside the vehicle, ultrafine dust (PM2.5) concentration, carbon dioxide (CO2) concentration, carbon monoxide (CO) concentration, sulfur dioxide (SO2) concentration, nitrogen dioxide (NO2) concentration, and ozone. (O3) May include at least one of concentration, humidity, and temperature.

The input unit may receive the air quality information from a sensor installed in the vehicle, or may receive air quality information measured within a certain range from the vehicle based on GPS information of the vehicle from a server. The comparison unit may detect characteristic values from the air quality information and compare the detected characteristic values with a preset threshold range.

The first control mode is a normal control mode that controls the air conditioning device according to a control value preset by the user, and the second control mode is a normal control mode that controls the air conditioning device so that the indoor air of the vehicle and the outside air do not mix. It may be a control mode that controls.

The selection unit sets the first control mode when the characteristic value detected from the air quality information is within the threshold range, and sets the second control mode when the characteristic value detected from the air quality information is not within the threshold range. can be set.

The control unit, when the first control mode is selected, generates a control value to open the first air discharge port of the vehicle air conditioner connected to a duct in which the air discharge direction is directed toward the inside of the vehicle, and when the second control mode is selected, , a control value that opens the second air outlet of the vehicle air conditioning system connected to the first air outlet and the duct disposed on the open window or door can be generated. The control unit generates a control value that drives the fan motor of the vehicle air conditioning device according to a first rotation speed when the first control mode is selected, and when the second control mode is selected, the fan motor of the vehicle air conditioning device is generated. The motor may generate a control value that drives the motor according to a second rotation speed that is greater than the first rotation speed.

The control unit, when the first control mode is selected, generates a control value to maintain the air circulation mode of the vehicle air conditioning system in a preset outside air mode or indoor mode, and when the second control mode is selected, the vehicle air conditioning system is operated. You can create a control value that converts the device's air circulation mode to ventilation mode. The second rotation speed may be preset to a value greater than the first rotation speed, or may be set to increase linearly or stepwise based on the first rotation speed and a result of comparing the air quality information with the critical range. You can.

A vehicle air conditioning control method according to an embodiment of the present invention includes receiving open/closed information about at least one of a window or door of a vehicle and air quality information outside the vehicle, and dividing the indoor air and outside air of the vehicle based on the open/closed information. A step of determining whether a situation in which mixing is possible occurs; if it is determined that a situation in which mixing of the indoor air of the vehicle and the outside air is possible occurs, comparing the input air quality information with a preset threshold range, and comparing the air quality information and the threshold range Selecting a first control mode or a second control mode based on at least one of the result of comparing and the opening/closing information, and controlling the vehicle according to the control value generated through the first control mode or the second control mode. and controlling at least one of an air outlet opening position, an air circulation mode, and an air discharge intensity of the included vehicle air conditioning device.

The air quality information includes fine dust (PM10) concentration outside the vehicle, ultrafine dust (PM2.5) concentration, carbon dioxide (CO ₂ ) concentration, carbon monoxide (CO) concentration, sulfur dioxide (SO ₂ ) concentration, and nitrogen dioxide (NO ₂ ) concentration. It may include at least one of concentration, ozone (O ₃ ) concentration, humidity, and temperature. The step of receiving air quality information outside the vehicle may include receiving the air quality information from a sensor installed in the vehicle, or receiving air quality information measured within a certain range from the vehicle based on GPS information of the vehicle from a server. there is. Comparing the air quality information and a preset threshold range may include detecting a characteristic value from the air quality information, and comparing the detected characteristic value with a preset threshold range.

The first control mode is a normal control mode that controls the air conditioning device according to a control value preset by the user, and the second control mode is a normal control mode that controls the air conditioning device so that the indoor air of the vehicle and the outside air do not mix. It may be a control mode that controls.

The step of selecting the first control mode or the second control mode includes setting the first control mode when the characteristic value detected from the air quality information is within a threshold range, and setting the characteristic value detected from the air quality information If it is not within the critical range, the second control mode can be set.

The controlling step includes, when the first control mode is selected, generating a control value that opens the first air outlet of the vehicle air conditioning device connected to a duct in which the air discharge direction is directed toward the inside of the vehicle, and the second control mode is selected. When selected, a control value that opens the second air outlet of the vehicle air conditioning system connected to the first air outlet and the duct disposed on the open window or door can be generated. The controlling step includes: when the first control mode is selected, the fan motor of the vehicle air conditioning device generates a control value that drives the fan motor according to a first rotation speed, and when the second control mode is selected, the vehicle air conditioning device The fan motor may generate a control value that drives the fan motor according to a second rotation speed that is greater than the first rotation speed.

The controlling step includes, when the first control mode is selected, generating a control value that converts the air circulation mode of the vehicle air conditioning device to an outside air mode, and when the second control mode is selected, the air circulation mode of the vehicle air conditioning device is generated. You can create a control value that converts the circulation mode to the bet mode.

The second rotation speed may be preset to a value greater than the first rotation speed, or may be set to increase linearly or stepwise based on the first rotation speed and a result of comparing the air quality information with the critical range. You can.

According to an embodiment, comfort inside the vehicle can be maintained by preventing contaminants from entering the vehicle when the vehicle's doors or windows are opened.

Energy efficiency can be increased by controlling the vehicle's air conditioning system according to air quality information outside the vehicle. In particular, in the case of electric vehicles powered by batteries, the driving distance of the vehicle can be increased by reducing the energy required for air conditioning inside the vehicle. In addition, even in cases where there is a high demand for autonomous/automatic control of the vehicle air conditioning system, such as in self-driving vehicles, it is possible to effectively control air quality inside the vehicle and increase air conditioning energy efficiency.

The various and beneficial advantages and effects of the present invention are not limited to the above-described content, and may be more easily understood through description of specific embodiments of the present invention.

1 is a schematic diagram of a vehicle air conditioning control system according to an embodiment of the present invention.
Figure 2 is a configuration diagram of a vehicle air conditioning control device according to an embodiment of the present invention.
Figure 3 is a diagram for explaining a vehicle air conditioning device according to an embodiment of the present invention.
Figure 4 is a diagram for explaining a duct according to an embodiment of the present invention.
Figure 5 is a diagram for explaining the process of selecting a first control mode and a second control mode according to an embodiment of the present invention.
Figure 6 is a diagram for explaining a control value setting process for the first control mode and the second control mode according to an embodiment of the present invention.
Figure 7 is a flowchart of a vehicle air conditioning control method according to an embodiment of the present invention.

Since the present invention can be subject to various changes and can have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms containing ordinal numbers, such as second, first, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

1 is a schematic diagram of a vehicle air conditioning control system according to an embodiment of the present invention.

Referring to FIG. 1, the vehicle air conditioning control system according to an embodiment of the present invention includes an opening/closing detection device 100, an air quality detection device 200, a vehicle air conditioning control device 300, a vehicle air conditioning device 400, and a duct 500. ) may include.

The opening/closing detection device 100 detects open/closed information of at least one of the window or door of the vehicle. The detected opening/closing information may be transmitted to the vehicle air conditioning control device 300.

The opening/closing detection device 100 may be implemented as a sensor installed on a window or door of a vehicle. For example, if a vehicle has four doors, four sensors can be installed on each door to detect whether the door is open or closed.

The air quality detection device 200 can detect air quality information outside the vehicle. Specifically, the air quality detection device 200 measures fine dust (PM10) concentration, ultrafine dust (PM2.5) concentration, carbon dioxide (CO ₂ ) concentration, carbon monoxide (CO) concentration, sulfur dioxide (SO ₂ ) concentration, and At least one of nitrogen dioxide (NO ₂ ) concentration, ozone (O ₃ ) concentration, humidity, and temperature can be detected. The detected air quality information may be transmitted to the vehicle air conditioning control device 300.

The air quality detection device 200 may be implemented as a fine dust measurement sensor, a carbon dioxide measurement sensor, an ozone measurement sensor, a humidity sensor, a temperature sensor, etc. The air quality detection device 200 may not only be installed in a vehicle, but may also be installed in a space outside the vehicle, such as a road. When the air quality detection device 200 is installed in a space outside the vehicle, the detected air quality information is transmitted directly to the vehicle air conditioning control device 300 or transmitted to the vehicle air conditioning control device 300 through a server that collects air quality information. It can be.

The vehicle air conditioning control device 300 controls the vehicle air conditioning device 400 installed in the vehicle based on opening/closing information and air quality information. The vehicle air conditioning control device 300 can transmit and receive data or control signals through wired or wireless communication with the opening/closing detection device 100, the air quality detection device 200, and the vehicle air conditioning device 400.

The vehicle air conditioning control device 300 can control the vehicle air conditioning device 400 through information on the opening and closing of windows or doors of the vehicle and information on air quality outside the vehicle. Specifically, when the vehicle air conditioning control device 300 determines that a situation in which mixing of the vehicle's interior air and outside air is possible due to the window or door of the vehicle being opened or closed, the vehicle air conditioning control device 300 selects a control mode according to the air quality information outside the vehicle and controls the vehicle. Control values for the vehicle air conditioning device 400 are generated according to the mode. The generated control value is transmitted to the vehicle air conditioning device 400.

The specific configuration of the vehicle air conditioning control device 300 will be examined in detail through the drawings below.

The vehicle air conditioning device 400 is a device that controls the temperature and air quality of air in the vehicle. The vehicle air conditioning device 400 sucks in the inside or outside air of the vehicle and discharges the sucked inside or outside air into the vehicle. Additionally, the vehicle air conditioning device 400 may control the temperature inside the vehicle by heating or cooling external or internal air.

The vehicle air conditioning device 400 may be implemented in the form of a HVAC (heating, ventilating and air conditioning) device and a blower, but is not limited thereto. The specific configuration of the vehicle air conditioning device 400 will be examined in detail through the drawings below.

The duct 500 is a device that transports air discharged from the vehicle air conditioning device 400. One end of the duct 500 may be connected to the air outlet of the vehicle air conditioning device 400. The duct 500 may export the air discharged by the vehicle air conditioning device 400 into the interior of the vehicle or in a horizontal direction to the window or door surface. The duct 500 may be composed of multiple ducts.

Figure 2 is a configuration diagram of a vehicle air conditioning control device according to an embodiment of the present invention.

Referring to FIG. 2, the vehicle air conditioning control device 300 according to an embodiment of the present invention includes an input unit 310, a determination unit 320, a comparison unit 330, a selection unit 340, and a control unit 350. do.

The input unit 310 receives information about the opening and closing of at least one of the windows or doors of the vehicle and information about the air quality outside the vehicle. Opening/closing information and air quality information can be input from sensors installed in the vehicle. At this time, air quality information may be input from a sensor installed outside the vehicle (e.g., road, building, etc.) or from a server that collects air quality information.

In one embodiment, when air quality information is received from a sensor installed outside the vehicle, the input unit 310 may receive air quality information from a sensor located within a certain communication range from the current location of the vehicle. In another embodiment, when air quality information is received from a server that collects air quality information, the input unit 310 may receive air quality information according to the vehicle's GPS. For example, the input unit 310 may receive information detected from a sensor within a certain distance from the current location of the vehicle according to GPS information from the server. To this end, the vehicle air conditioning control device 300 may transmit the vehicle's current GPS information to the server.

The determination unit 320 determines whether a situation in which mixing of the vehicle's indoor air and outside air occurs based on the opening/closing information. Specifically, if the determination unit 320 determines that at least one of the windows or doors of the vehicle is open through the open/close information, it may determine that a situation in which mixing of the vehicle's indoor air and external air has occurred has occurred. At this time, the determination unit 320 may determine not only whether the window or door is open based on the open/closed information, but also the location of the open window or door.

When the comparison unit 330 determines that a situation in which mixing of the vehicle's indoor air and external air is possible occurs, the comparison unit 330 compares the air quality information input from the input unit 310 with a preset threshold range. Specifically, the comparison unit 330 may compare characteristic values generated from air quality information with a preset threshold range.

According to one embodiment, the comparison unit 330 may detect characteristic values from each of a plurality of pieces of information included in the air quality information and compare the characteristic values with the threshold ranges corresponding to each. Here, the characteristic value may mean a numerical value of each piece of information. For example, assume that air quality information includes fine dust concentration, carbon dioxide concentration, and vehicle exterior temperature. Then, the comparator 330 may generate a numerical value of the fine dust concentration, a numerical value of the carbon dioxide concentration, and a numerical value of the vehicle external temperature as characteristic values of each information.

At this time, the threshold range may be set for each of the fine dust concentration, carbon dioxide concentration, and vehicle exterior temperature, and the comparison unit 330 may compare the threshold ranges corresponding to the characteristic values of each information. However, the critical range corresponding to the temperature outside the vehicle may be set differently depending on the air conditioning setting temperature inside the vehicle. For example, if the cabin air conditioning set temperature is in the cooling range, the critical range may be set to less than 30 degrees Celsius. However, if the cabin air conditioning set temperature is in the heating range, the critical range can be set to -5 degrees or higher.

According to another embodiment, the comparison unit 330 may calculate an air quality index as a characteristic value through air quality information including a plurality of pieces of information, and compare the calculated air quality index with the corresponding critical range. For example, assume that air quality information includes carbon monoxide concentration, vehicle exterior temperature, and vehicle exterior humidity. Then, the comparator 330 may calculate the air quality index by multiplying the numerical values for each of the carbon monoxide concentration, vehicle exterior temperature, and vehicle exterior humidity by a weight and then averaging them. At this time, the weight corresponding to the air quality index may be one. However, in the case of the vehicle's external temperature, the weight value may be set differently depending on the season.

The selection unit 340 selects the first control mode or the second control mode based on at least one of the result of comparing the air quality information and the critical range and the opening/closing information.

Specifically, the selection unit 340 sets the first control mode when the characteristic value detected from the air quality information is within the threshold range, and sets the second control mode when the characteristic value detected from the air quality information does not fall within the threshold range. can be set.

The control unit 350 controls at least one of the air outlet opening position, air discharge intensity, and air circulation mode of the vehicle air conditioning system included in the vehicle according to the control value generated through the first control mode or the second control mode. The process by which the control unit 350 generates control values will be examined in detail through the drawings below.

Figure 3 is a diagram for explaining a vehicle air conditioning device according to an embodiment of the present invention.

Referring to FIG. 3, the vehicle air conditioning device according to an embodiment of the present invention includes a fan motor 410, an air intake end 420, an evaporator 430, a heater 440, and an air discharge end 450 installed in the case. It includes and may further include an air filter (not shown).

The fan motor 410 rotates a fan to introduce air into the vehicle. The rotation speed of the fan motor 410 may be controlled through a control signal from a vehicle air conditioning control device.

The air intake end 420 is an opening that sucks external or internal vehicle air into the vehicle air conditioning system. The air intake end 420 may include an outdoor air inlet for sucking in outdoor air and an internal air inlet for sucking in indoor air. The air intake end 420 may be equipped with a door member that can open and close the outside air inlet or the inside air inlet, and may be controlled through a control signal from the vehicle air conditioning control device.

The evaporator 430 cools the air introduced through the air intake end 420 through a refrigerant. At this time, the refrigerant may be supplied through a compressor (not shown).

The heater 440 heats the air introduced through the air intake end 420. The heater 440 may include a heater core and a tamp door, and heats air through the heater core according to the opening/closing direction of the tamp door. At this time, the heater 440 can heat the air through engine coolant supplied from the engine. The heater core can be replaced with an electric heater, or the heater core and electric heater can be used simultaneously.

The air discharge stage 450 discharges air to ducts placed at each point of the vehicle. Since ducts are arranged at multiple locations in the vehicle, the air discharge end 450 may include a plurality of air discharge ports corresponding to each duct. Additionally, the air discharge end 450 may be equipped with a door member capable of opening and closing each of the plurality of air discharge ports, and each door member may be controlled through a control value of the vehicle air conditioning control device.

An air filter (not shown) removes impurities, polluted gases, microorganisms, etc. contained in the air flowing in through the air intake end 420.

Figure 4 is a diagram for explaining a duct according to an embodiment of the present invention.

The duct 500 is installed in the vehicle and connected to the air discharge end of the vehicle air conditioning device 400, and discharges the air discharged from the air discharge end.

Duct 500 may be placed at multiple locations in the vehicle. Which of the plurality of ducts 500 emits air may vary depending on the control value generated by the vehicle air conditioning control device 300 based on detection information from the air quality detection device 200.

According to an embodiment of the present invention, the duct 500 may be arranged to export air into the interior of the vehicle as shown in a and b. Additionally, the duct 500 may be arranged toward the door or window of the vehicle, as shown in c. When placed toward a door or window, the air emitted by the duct 500 may function like an air curtain. In other words, the air discharged from the duct 500 may serve to prevent the outflow of internal air and the inflow of external air of the vehicle. When the duct 500 is placed on a door or window, it may be placed on the upper part of the vehicle where the door or window is placed, but is not limited to this.

Let's look at the first control mode and the second control mode according to an embodiment of the present invention in detail through FIGS. 5 and 6.

Figure 5 is a diagram for explaining the process of selecting a first control mode and a second control mode according to an embodiment of the present invention.

According to an embodiment of the present invention, the first control mode and the second control mode are air conditioning device control for controlling the air conditioning device of the vehicle in an environment where the indoor air of the vehicle and the outside air can be mixed (when the vehicle door or window is opened). means mode. Referring to FIG. 5, the first control mode may be an air conditioning device control mode selected when the characteristic value is within the critical range, and the second control mode may be an air conditioning device control mode selected when the characteristic value is not within the critical range. there is.

The first control mode refers to a normal air conditioning device control mode. Specifically, the first control mode is the air conditioning device settings (e.g., air temperature set inside the vehicle, discharge air volume, discharge wind direction, etc.) set by the passenger through the air conditioner setting unit (e.g., heater/air conditioner controller). This may mean a mode for controlling the air conditioning device. That is, the first control mode may be a normal control mode that controls the air conditioning device according to a control value preset by the user.

The second control mode refers to an air conditioning device control mode to prevent mixing of vehicle interior air and outside air. Specifically, the second control mode may mean a mode in which the operating range of the air conditioning device is increased so that outside air of the vehicle other than the air conditioning device setting value set by the passenger does not flow into the vehicle interior. That is, the second control mode may be a control mode that controls the air conditioning device so that the indoor air of the vehicle and the outside air do not mix.

Figure 6 is a diagram for explaining a control value setting process for the first control mode and the second control mode according to an embodiment of the present invention.

Referring to FIG. 6, let's look at the process of setting control values for the first control mode and the second control mode in detail.

The control unit may generate a control value for controlling the vehicle air conditioning system according to the first control mode or the second control mode selected by the selection unit. As shown in FIG. 5, the selection unit selects the first control mode when the detected characteristic value is within the threshold range, and selects the second control mode when the detected characteristic value is outside the threshold range. Even if the first control mode is selected, if the subsequently detected characteristic value is outside the threshold range, the selection unit may select the second control mode. Conversely, even if the second control mode is selected, if the subsequently detected characteristic value falls within the threshold range, the selection unit may select the first control mode.

The controller may generate a control value that controls at least one of the air outlet opening position, air discharge intensity, and air circulation mode according to the selected mode.

As an example, we will look at generating a control value that controls the opening position of the air outlet. When the first control mode is selected, the control unit generates a normal air conditioner control value that opens the first air discharge port of the vehicle air conditioner connected to the duct in which the air discharge direction is directed toward the inside of the vehicle. Additionally, when the second control mode is selected, the controller may generate a control value that opens the first air outlet or the second air outlet of the vehicle air conditioning system connected to the duct disposed on the open window or door. That is, when the second control mode is selected, the second air outlet of the vehicle air conditioner is opened to prevent mixing of the vehicle's interior air and outside air to supply air to the open window or door, thereby increasing the air volume inside the vehicle. do.

As an example, we will look at the generation of control values that control the air circulation mode. When the first control mode is selected, the control unit controls a control value that maintains the air circulation mode of the vehicle air conditioning system in a preset outside air mode or indoor mode, or a control value that converts the air circulation mode to the outside air mode or indoor mode corresponding to a normal vehicle air conditioning device control value. Create a value. And, when the second control mode is selected, the control unit generates a control value that converts the air circulation mode of the vehicle air conditioning system to the ventilation mode. That is, when the second control mode is selected, the air circulation mode is converted to the ventilation mode to perform an air conditioning system control mode to prevent mixing of vehicle interior air and outside air.

As an example, we will look at generating a control value that controls the intensity of air discharge. When the first control mode is selected, the control unit generates a control value that causes the fan motor of the vehicle air conditioning system to drive according to the first rotation speed corresponding to the normal air conditioning system control value. And, when the second control mode is selected, the control unit generates a control value that causes the fan motor of the vehicle air conditioning system to be driven at a second rotation speed that is greater than the first rotation speed. At this time, the second rotation speed may be preset to a value greater than the first rotation speed. That is, when the second control mode is selected, the fan motor speed of the vehicle air conditioner is driven at a second speed greater than the first speed, which is the normal air conditioner control value, to prevent mixing of vehicle interior air and outside air. .

For example, referring to FIG. 6, when the first control mode is selected, the control unit generates Q _n [rpm], which is preset as the first rotation speed, as a control value, and when the second control mode is selected, the control unit generates the second rotation speed The preset Q _b [rpm] can be generated as a control value. That is, the preset second rotation speed may be set to have a value greater than the preset first rotation speed by Q _a .

Alternatively, the second rotation speed may be set to increase linearly or stepwise based on the first rotation speed and a result of comparing the air quality information and the critical range.

For example, when the second rotation speed is set to increase linearly, the control unit can generate the second rotation speed through Equation 1 below.

Here, V ₂ is the second rotation speed, α is the rotation speed increase rate, V _d is the characteristic value, V _l is the maximum or minimum value of the critical range, and V ₁ is the first rotation speed.

And, when the second rotation speed is set to increase step by step, the control unit can generate the second rotation speed through Equation 2 below.

Here, V ₂ is the second rotation speed, α is the rotation speed increase rate, β is an arbitrary constant, V _d is a characteristic value, V _l is the maximum or minimum value of the critical range, and V ₁ is the first rotation speed.

As explained with reference to FIGS. 5 and 6, the second control mode for preventing mixing of vehicle interior air and outside air increases the operating range of the air conditioner compared to the first control mode corresponding to the normal air conditioner control mode. increase Specifically, when performing the second control mode, air volume is supplied toward the vehicle window or door, or the fan motor rotation speed of the vehicle air conditioning device is adjusted to a second rotation speed greater than the first rotation speed corresponding to the normal air conditioning device control value. By controlling the number of revolutions, the operating range of the air conditioning device increases compared to the first control mode, such as supplying a larger amount of air into the vehicle interior than in the first control mode. Accordingly, the second control mode consumes relatively more air conditioning energy than the first control mode.

However, according to an embodiment of the present invention, the second control mode is selectively performed by detecting or receiving air quality information of the air outside the vehicle and comparing it with a critical range, so that the second control mode is performed even in an environment where the vehicle's windows or doors are open. When the mode is unnecessary, the consumption of air conditioning energy can be reduced by controlling the air conditioning device in the normal first control mode. For example, even if the window or door of the vehicle is open, if the air quality of the air outside the vehicle is within the critical range (within the allowable range), the second control mode is not selected to allow the vehicle interior air and outside air to be mixed. Accordingly, there is no need to supply air volume to the second air outlet or control the fan motor rotation speed to a relatively large second rotation speed to form the air curtain, thereby significantly saving air conditioning energy.

Figure 7 is a flowchart of a vehicle air conditioning control method according to an embodiment of the present invention.

The input unit receives information about the opening and closing of at least one of the windows or doors of the vehicle and information about the air quality outside the vehicle (S710).

At this time, the input unit may receive air quality information from a sensor installed in the vehicle, or may receive air quality information measured within a certain range from the vehicle based on the vehicle's GPS information from the server.

The determination unit determines whether a situation in which mixing of the vehicle's indoor air and external air occurs based on the opening/closing information (S720).

In step S720, if it is determined that a situation in which mixing of the vehicle's indoor air and external air is possible occurs, the comparison unit compares the air quality information with a preset critical range (S730).

Specifically, the comparison unit may detect characteristic values from air quality information and compare the detected characteristic values with a preset threshold range (S740).

The selection unit may select the first control mode or the second control mode based on the result of comparing the air quality information and the critical range and the opening/closing information.

Specifically, the selection unit may set the first control mode if the characteristic value detected from the air quality information is within the threshold range (S750), and otherwise set the second control mode (S760).

The controller may control at least one of the air outlet opening position, air discharge intensity, and air circulation mode of the vehicle air conditioning system included in the vehicle according to the control value generated through the first control mode or the second control mode (S770). .

The term '~unit' used in this embodiment refers to software or hardware components such as FPGA (field-programmable gate array) or ASIC, and the '~unit' performs certain roles. However, '~part' is not limited to software or hardware. The '~ part' may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Therefore, as an example, '~ part' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and 'parts' may be combined into a smaller number of components and 'parts' or may be further separated into additional components and 'parts'. Additionally, components and 'parts' may be implemented to regenerate one or more CPUs within a device or a secure multimedia card.

Although the above description focuses on the examples, this is only an example and does not limit the present invention, and those skilled in the art will be able to You will see that various variations and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

100: Open/close detection device 200: Air quality detection device
300: Vehicle air conditioning control device 310: Input unit
320: judgment unit 330: comparison unit
340: selection unit 350: control unit
400: Vehicle air conditioning device 500: Duct

Claims (20)

An input unit that receives information on the opening and closing of at least one of the vehicle's windows or doors and air quality information outside the vehicle,
a determination unit that determines whether a situation in which mixing of indoor air and outside air of the vehicle is possible based on the opening and closing information;
A comparison unit that compares the input air quality information with a preset critical range when it is determined that a situation in which mixing of the vehicle's indoor air and outside air is possible occurs;
A selection unit for selecting a first control mode or a second control mode based on at least one of a result of comparing the air quality information and the critical range and the opening/closing information, and
A control unit that controls the air outlet opening position, air circulation mode, and air discharge intensity of the vehicle air conditioning system included in the vehicle according to the control value generated through the first control mode or the second control mode,
The air quality information includes fine dust (PM10) concentration outside the vehicle, ultrafine dust (PM2.5) concentration, carbon dioxide (CO2) concentration, carbon monoxide (CO) concentration, sulfur dioxide (SO2) concentration, nitrogen dioxide (NO2) concentration, and ozone ( O3) Contains concentration, humidity and temperature,
The comparison unit includes fine dust (PM10) concentration, ultrafine dust (PM2.5) concentration, carbon dioxide (CO2) concentration, carbon monoxide (CO) concentration, sulfur dioxide (SO2) concentration, nitrogen dioxide (NO2) concentration, The numerical values of ozone (O3) concentration, humidity, and temperature are multiplied by weights and averaged to calculate the air quality index as a characteristic value, and the characteristic value is compared with a preset threshold range,
The control unit controls the air discharge intensity according to the difference between the characteristic value and the maximum or minimum value of the critical range,
The weight has a unique value corresponding to each numerical value included in the air quality information, but in the case of the temperature outside the vehicle, the weight is set differently depending on the season. delete According to paragraph 1,
The input unit,
Receive the air quality information from a sensor installed in the vehicle, or
A vehicle air conditioning control device that receives air quality information measured within a certain range from the vehicle based on the vehicle's GPS information from a server. delete According to paragraph 1,
The first control mode is a normal control mode that controls the air conditioning device according to a control value preset by the user,
The second control mode is a vehicle air conditioning control device that controls the air conditioning device so that the indoor air of the vehicle and the outside air do not mix. According to paragraph 1,
The selection part is,
If the characteristic value detected from the air quality information is within the threshold range, set the first control mode,
A vehicle air conditioning control device that sets the second control mode if the characteristic value detected from the air quality information is not within the threshold range. According to clause 6,
The control unit,
When the first control mode is selected, a control value is generated to open the first air outlet of the vehicle air conditioner connected to a duct in which the air discharge direction is directed toward the inside of the vehicle,
When the second control mode is selected, a vehicle air conditioning control device that generates a control value for opening a second air outlet of the vehicle air conditioning device connected to the first air outlet and a duct disposed on an open window or door. In clause 7,
The control unit,
When the first control mode is selected, the fan motor of the vehicle air conditioning system generates a control value to drive according to the first rotation speed,
When the second control mode is selected, a vehicle air conditioning control device generates a control value that causes the fan motor of the vehicle air conditioning device to be driven according to a second rotation speed that is greater than the first rotation speed. According to clause 6,
The control unit,
When the first control mode is selected, a control value is generated to maintain the air circulation mode of the vehicle air conditioning system in a preset outdoor air mode or internal air mode,
A vehicle air conditioning control device that generates a control value that converts the air circulation mode of the vehicle air conditioning device into an air circulation mode when the second control mode is selected. According to clause 8,
The second rotation speed is,
It is preset to a value greater than the first rotation speed, or
A vehicle air conditioning control device set to increase linearly or stepwise based on a result of comparing the air quality information and the critical range and the first rotation speed. Information on opening and closing at least one of the vehicle's windows or doors and the concentration of fine dust (PM10), ultrafine dust (PM2.5), carbon dioxide (CO2), carbon monoxide (CO), and sulfur dioxide (SO2) concentration outside the vehicle. , receiving air quality information including nitrogen dioxide (NO2) concentration, ozone (O3) concentration, humidity and temperature,
Determining whether a situation in which mixing of indoor air and outside air of the vehicle is possible occurs based on the opening and closing information,
If it is determined that a situation in which mixing of the vehicle's indoor air and external air is possible occurs, the fine dust (PM10) concentration, ultrafine dust (PM2.5) concentration, carbon dioxide (CO2) concentration, and carbon monoxide (CO) included in the air quality information ) Concentration, sulfur dioxide (SO2) concentration, nitrogen dioxide (NO2) concentration, ozone (O3) concentration, humidity, and temperature each numerical value is multiplied by a weight and averaged to calculate the air quality index as a characteristic value, and the characteristic value is used as a reference value. A step of comparing with the set critical range,
Selecting a first control mode or a second control mode based on at least one of a result of comparing the air quality information and the critical range and the opening/closing information, and
Controlling the air outlet opening position, air circulation mode, and air discharge intensity of the vehicle air conditioning device included in the vehicle according to the control value generated through the first control mode or the second control mode,
The step of controlling the air discharge intensity controls the air discharge intensity according to the difference between the characteristic value and the maximum or minimum value of the critical range,
The weight has a unique value corresponding to each numerical value included in the air quality information, but in the case of the temperature outside the vehicle, the weight is set differently depending on the season. delete According to clause 11,
The step of receiving air quality information outside the vehicle is,
Receive the air quality information from a sensor installed in the vehicle, or
A vehicle air conditioning control method that receives air quality information measured within a certain range from the vehicle based on the vehicle's GPS information from a server. delete According to clause 11,
The first control mode is a normal control mode that controls the air conditioning device according to a control value preset by the user,
The second control mode is a vehicle air conditioning control method that controls the air conditioning device so that the indoor air of the vehicle and the outside air do not mix. According to clause 11,
The step of selecting the first control mode or the second control mode is,
If the characteristic value detected from the air quality information is within the threshold range, set the first control mode,
A vehicle air conditioning control method for setting the second control mode if the characteristic value detected from the air quality information is not within the threshold range. According to clause 16,
The controlling step is,
When the first control mode is selected, a control value is generated to open the first air outlet of the vehicle air conditioner connected to a duct in which the air discharge direction is directed toward the inside of the vehicle,
When the second control mode is selected, a vehicle air conditioning control method for generating a control value for opening a second air outlet of the vehicle air conditioning system connected to the first air outlet and a duct disposed on an open window or door. According to clause 16,
The controlling step is,
When the first control mode is selected, the fan motor of the vehicle air conditioning system generates a control value to drive according to the first rotation speed,
When the second control mode is selected, the fan motor of the vehicle air conditioning device generates a control value that is driven according to a second rotation speed greater than the first rotation speed. According to clause 16,
The controlling step is,
When the first control mode is selected, a control value is generated to convert the air circulation mode of the vehicle air conditioning system to an outdoor air mode,
A vehicle air conditioning control method that generates a control value that converts the air circulation mode of the vehicle air conditioning system to the air circulation mode when the second control mode is selected. According to clause 18,
The second rotation speed is,
It is preset to a value greater than the first rotation speed, or
A vehicle air conditioning control method set to increase linearly or stepwise based on a result of comparing the air quality information and the critical range and the first rotation speed.

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